Journal of the Chemical Society. Perkin transactions II p. 1659 - 1666 (1984)
Update date:2022-07-30
Topics:
Clemens, Anthony H.
Ridd, John H.
Sandall, John P. B.
The nitration of mesitylene by nitric acid in trifluoroacetic acid has been followed by 1H and 15N n.m.r. spectroscopy using H(15)NO3 (95-99percent 15N).With concentrations of mesitylene > 0.5 mol dm3, the direct nitration by the nitronium ion is accompanied by an autocatalytic reaction involving nitrous acid.The nitrous acid-catalysed process is inhibited by azide ions and can be made to predominate by the addition of nitrous acid.Nitration by the nitronium ion gives no nuclear polarisation in the product but the nitrous acid-catalysed reaction gives marked 15N nuclear polarisation: the 15N n.m.r. spectrum of nitromesitylene during reaction then appears in emission with a degree of enhancement that can exceed a factor of 200.This nuclear polarisation is attributed to the formation of a radical pair ArH+.NO2. by the diffusion together of the components.The side-products formed in the nitrous acid-catalysed process are consistent with reactions through ArH+..The direct nitration of mesytilene by the nitronium ion does not appear to involve this cation radical.
View MoreWeifang Adde Economic And Trade Co.,LTD.
Contact:86-536-8885548
Address:Room 1402,Wanda Plaza B Block,No.958,Yuanfei Road,Kuiwen District
Contact:+86-913-2223392
Address:No. 32, Xinanjing Road, Weinan City, Shaanxi Province, 714000, China
Kaymossy BioChem Tech Co., Ltd
website:http://www.kaimosi.com
Contact:0571-87191913/0571-87199097
Address:Room 215, Building 3rd, No.288 Ningxia Road, Qingdao city, China
Shijiazhuang Haotian Chemical Co., Ltd.
Contact:86-311-85044374
Address:293 Donggang Road
Shanghai united Scientific Co.,Ltd.
Contact:+86-21-53535353
Address:28F No.900 huaihai Road Shanghai China
Doi:10.1021/ja060534l
(2006)Doi:10.1021/ie50447a634
(1947)Doi:10.1246/bcsj.50.285
(1977)Doi:10.1021/jo00197a040
(1984)Doi:10.1016/j.bmcl.2011.04.052
(2011)Doi:10.1021/ic0341284
(2003)
